Vyatkina O. Heterogenic-catalyzed oxidation of phenols in the system hydrogen peroxide-bentonite-water

It was established that the investigated bentonite is polimineral and it's basic component is Ca-montmorillonite, which con-tains easy linked ions Fe3+. The full exchange capacity of bentonite was established. The nature and quantity of adsorptive and catalyzed centers is established by the potentiometric titration of bentonite suspensions method. The high catalyze ac-tivity of bentonite in water hydrogen peroxide solutions was evident. It was determined that adsorption of phenols on ben-tonite under standard conditions is limited and irreversible. The character and speed of adsorption depend on polarity of adsorbed connection. The kinetics of oxidation of phenol in the systems, which model natural waters, was researched. It was established that irreversible adsorption of phenols at the presence of ions of metals of variable valence at heterogene-ous water systems with bentonite increases a degree and speed of their conversion. The calculated models were formed on the basis of kinetic calculations andexperimental data. They allow us to estimate limited ecological load low-mineralized natural reservoirs polluted by phenols. The results of adsorptive-kinetic researches and calculations allow us to offer ben-tonite as a universal material of the carrier for systems of clearing and additional cleaning of various water environments.